Hello Daniel,

The latest 89CXX/89C2051 programmer can be seen at this address.
http://www.sunrom.com/projects/...ammer.html.
They provide everything you need (Schematic, Drivers, Hardware)
to build this programmer yourself or from their kit
(http://www.sunrom.com/store/ima...g_LRG.jpg)
they sell for about $60. You can buy their printed circuit board
for $8 which can save you a lot of trouble building this thing.
sunrom 89CXX newest Programmer



The software (ProLoad V2.1) to program the 89CXX/89C2051 can be
downloaded from this site.
http://www.sunrom.com/products/proload_v2.1_-_mcu_program_loader.html

The software is smart enough to recognize the chip when you insert it into the socket. Very impressive.
ProLoad V2.1 software



The firmware software for the 89C52 is written in SDCC or Keil
and is open source which means you can change it to suite your
needs. I build this programmer and posted a schematic at this
site. http://members.aol.com/cpu8052/writer2.gif
They sell a preprogrammed 89C52 IC for $8 in case you don't have a programmer yourself.

This is a very good programmer. Hope this helps

Regards,

Charles Bannister